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From: Jolly Roger <jollyroger@pobox.com>
Newsgroups: misc.phone.mobile.iphone
Subject: Re: Hot iPhone 13 lost a lot of battery power within 3.5 hrs.
Date: 2 Aug 2024 16:21:16 GMT
Organization: People for the Ethical Treatment of Pirates
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On 2024-08-01, Chris <ithinkiam@gmail.com> wrote:
> Ant <ant@zimage.comANT> wrote:
>> Chris <ithinkiam@gmail.com> wrote:
>>> Ant <ant@zimage.comANT> wrote:
>>>> Hello,
>>>> 
>>>> Weird/Odd. Hot iPhone 13's iOS v17.6 (updated from iOS v17.5.1
>>>> yesterday) battery power percentage dived from recharged 88% to 23%
>>>> from 6 PM to 9:30 PM while out to eat dinner in a crowded
>>>> restaurant and commute to there and back home. Battery statistics
>>>> said it was hot to recharge at 88% max. Usage shows "Find My" and
>>>> weak cellular using half in the background for the first hour, but
>>>> after that was just "Find My".  Battery health shows 89% which is
>>>> normal for this iPhone from 2/1/2022.  What's going on? Is this a
>>>> new bug or something? :/
>> 
>>> Higher than normal battery drain is expected with a new version of
>>> ios as the caches and indexes get refreshed. 
>> 
>>> Give it a day or so to settle down. 
>> 
>> Is it supposed to run even when on battery only when not at home? It
>> would had been nice if it happened when connected to a power charger
>> at home. :(
>
> It's normally not an issue and runs in the background. Occasionally it
> drains more than normal for whatever reason. You seem to have hit one
> of those occasions. 
>
> Actually, you also mentioned weak cellular signal which is very
> effective at draining battery power. 

Absolutely. When the cellular (or WiFi) signal is low, the device boosts
the radio power which naturally drains the battery faster. Combine that
with the normal post-installation indexing and cache rebuilds, and you
have a recipe for abnormally-high battery drain.

-- 
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JR